package zj.xinxin.web.config;

import org.springframework.context.support.DefaultMessageSourceResolvable;
import org.springframework.validation.BindException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import zj.xinxin.common.result.ResponseResult;

import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import java.util.stream.Collectors;

@ControllerAdvice
public class WebExceptionHandler {

    //处理Get请求中 使用@Valid 验证路径中请求实体校验失败后抛出的异常
    @ExceptionHandler(BindException.class)
    @ResponseBody
    public ResponseResult<String> BindExceptionHandler(BindException e) {
        String message = e.getBindingResult()
                .getAllErrors()
                .stream()
                .map(DefaultMessageSourceResolvable::getDefaultMessage)
                .collect(Collectors.joining());
        return ResponseResult.fail(message);
    }

    //处理请求参数格式错误 @RequestParam上validate失败后抛出的异常是javax.validation.ConstraintViolationException
    @ExceptionHandler(ConstraintViolationException.class)
    @ResponseBody
    public ResponseResult<String> ConstraintViolationExceptionHandler(ConstraintViolationException e) {
        String message = e.getConstraintViolations()
                .stream()
                .map(ConstraintViolation::getMessage)
                .collect(Collectors.joining());
        return ResponseResult.fail(message);
    }

    //处理请求参数格式错误 @RequestBody上validate失败后抛出的异常是MethodArgumentNotValidException异常。
    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseBody
    public ResponseResult<String> MethodArgumentNotValidExceptionHandler(MethodArgumentNotValidException e) {
        String message = e.getBindingResult()
                .getAllErrors()
                .stream()
                .map(DefaultMessageSourceResolvable::getDefaultMessage)
                .collect(Collectors.joining());
        return ResponseResult.fail(message);
    }
}